Screw gun



FIG. 1 is a top perspective view of a screw gun of the presentinvention;

FIG. 2 is a first side view thereof;

FIG. 3 is a second side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

Any broken lines in the drawings are for illustrative purposes only andform no part of the claimed design.

We claim the ornamental design for a screw gun, as shown and described.